Study on Leakage and Diffusion Law Under the Combined Laying of Gas Pipelines and Power Channels

With the continuous development of the times and the natural gas industry, the number of composite laying between natural gas pipelines and power channels has increased. Once a gas pipeline leaks, it is easy to enter the power channel and cause serious explosion accidents. This article uses ANSYS/Fluent numerical simulation software to establish a composite laying model for buried gas pipelines and conducts numerical simulation research on gas pipeline leakage, obtaining the leakage laws of gas under different pressure levels, leakage hole diameters, and soil types. The results show that the concentration of gas and leakage entering the power channel increases linearly with the increase in pressure. However, as the pressure continues to increase, the impact on diffusion weakens. It has been demonstrated that an increase in the diameter of the leakage hole results in accelerated diffusion, leading to an increased diffusion rate into the power channel. It is evident that the magnitude of the viscous resistance coefficient and inertial resistance coefficient of the soil directly correlates with the ease with which gas can diffuse within the soil.